/*
 * cron4j - A pure Java cron-like scheduler
 *
 * Copyright (C) 2007-2010 Carlo Pelliccia (www.sauronsoftware.it)
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License version
 * 2.1, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License 2.1 for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License version 2.1 along with this program.
 * If not, see <http://www.gnu.org/licenses/>.
 */
package com.jspx.crontab;

import java.util.List;

/**
 * <p>
 * A ValueMatcher whose rules are in a plain array of integer values. When asked
 * to validate a value, this ValueMatcher checks if it is in the array and, if
 * not, checks whether the last-day-of-month setting applies.
 * </p>
 * 
 * @author Paul Fernley
 */
class DayOfMonthValueMatcher extends IntArrayValueMatcher {

private static final int[] lastDays = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };

/**
 * Builds the ValueMatcher.
 * 
 * @param integers
 *            An ArrayList of Integer elements, one for every value accepted
 *            by the matcher. The match() method will return true only if
 *            its parameter will be one of this list or the
 *            last-day-of-month setting applies.
 */
public DayOfMonthValueMatcher(List<Integer> integers) {
super(integers);
}

/**
 * Returns true if the given value is included in the matcher list or the
 * last-day-of-month setting applies.
 */
public boolean match(int value, int month, boolean isLeapYear) {
return (super.match(value) || (value > 27 && match(32) && isLastDayOfMonth(value, month, isLeapYear)));
}

public boolean isLastDayOfMonth(int value, int month, boolean isLeapYear) {
if (isLeapYear && month == 2) {
return value == 29;
} else {
return value == lastDays[month - 1];
}
}

}